Caracterização da germinação e morfologia de frutos, sementes e plântulas de Dalbergia cearensis Ducke (pau-violeta) - Fabaceae

Nogueira, Francisco Carlos Barboza; Filho, Sebastião Medeiros; Gallão, Maria Izabel

doi:10.1590/s0102-33062010000400013

Cited by 23 publications

(19 citation statements)

References 28 publications

(25 reference statements)

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“…Nevertheless, the browning in the primary roots of this species' seedlings is due to the woody character of the root and not to infection. The same has been observed in other species of Fabaceae (FÉLIX-DA-SILVA et al, 2009;NOGUEIRA et al, 2010;SOUSA et al, 2010).…”

Section: Discussionsupporting

confidence: 81%

Robustness of germination analysis methods for Copaifera langsdorffii Desf. (Fabaceae) seeds

Santana¹,

Lobo²,

Salomão³

et al. 2016

Biosci. J.

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Germination of Copaifera langsdorffii Desf. seeds is non-uniform and asynchronous and there is still no consensus on the factors affecting it. Thus, the goal was to measure the robustness of pre-germination methods used to determine germination rates of C. langsdorffii seeds of different levels of quality and to present criteria for seedling classification that culminate in the officialization of one of these methods. Pre-germination methods were tested and the scarification of seeds sterilized with 0.05% NaClO was the most efficient for maximizing germination potential. Seeds of different quality were then treated with this method and collaborative tests evaluated by Ministry of Agriculture laboratories. These evaluations were based on normal seedlings produced from each seed lot. Morphofunctional classification was used throughout to determine essential seedling structures. Robustness of the method was measured by variance and the coefficient of variation of repeatability and reproducibility. Scarification and sterilization with sodium hypochlorite made it possible to both estimate the germination potential of seeds of different quality levels and reduce seedling infection and seed mortality. To analyze germination based on seedling criteria, normal seedlings of this species were defined as having thick cotyledons that are detached from the seed coat, developed hypocotyls and epicotyls and primary roots. These seedlings have woody primary roots and thick, sometimes poorly developed hypocotyls. Even though C. langsdorffii is a forest species and subject to high variability, the proximity of the percentages of normal seedlings among repetitions (low repeatability) and low inter-laboratory reproducibility reflecting the uniformity generated by the method.

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Section: Discussionsupporting

confidence: 81%

Robustness of germination analysis methods for Copaifera langsdorffii Desf. (Fabaceae) seeds

Santana¹,

Lobo²,

Salomão³

et al. 2016

Biosci. J.

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“…Large seeds increase seedling survival. However, in order to understand that in relationship it is necessary to have knowledge of how the reserves of seed are used during germination and early seedling establishment (Nogueira et al, 2010). The weight of the seed has a strong influence on the plant establishment, since the heavier seeds often originate seedlings with larger initial length and better survival in a low light environment (Parker et al, 2006).…”

Section: Morphological Characterization Of Seedsmentioning

confidence: 99%

“…The weight of the seed has a strong influence on the plant establishment, since the heavier seeds often originate seedlings with larger initial length and better survival in a low light environment (Parker et al, 2006). On the other hand, to Nogueira et al (2010) small seeds have greater ease in obtaining water for germination than large seeds, due to the higher surface/volume ratio. Thus, because of its size, seeds of A. farnesiana have advantages for semi-arid conditions of the Brazilian Northeast, since water availability is restricted to a short rainy season.…”

Section: Morphological Characterization Of Seedsmentioning

confidence: 99%

Morphological analysis of fruits, seeds, and seedling germination Acacia farnesiana (L.) Willd

Melo¹,

Silva²,

Alves³

et al. 2016

Afr. J. Agric. Res.

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The understanding of the morphology of fruits, seeds and seedlings is very important on the identification and the preservation of species. The work describes and illustrates morphological characteristics of fruits, seeds, germination, and seedlings of Acasia farnesiana. The fruits were collected manually from parent trees selected at random, in the municipality of Sousa State of Paraíba. After collection, they were packed in polyethylene bags and taken to the Seed Analysis Laboratory, Universidade Federal da Paraiba, Areia-PB. Subsequently, evaluations were made of the morphological and morphometric characteristics of fruit, seed germination stages, and seedling. The fruit is of type nucule vegetable, plain, dry, polysemy, glabrous, linear-format wavy and late dehiscence. The seeds are stenospermics, format obovoid, apex rounded, and base slightly rounded. The germination is epigealphanerocotyledonal, starting on the third day and may be terminated on the seventh day after sowing. It was possible to describe and illustrate in detail the morphology of fruit, seeds, germination stages, and seedling of the species, considering the characteristics of easy recognition, standardization, rapid achievement, and high probability of establishment in the field.

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“…Suas plantas não têm estruturas armazenadoras de água no caule ou na raiz, perdem as folhas no início da estação seca, permanecem decíduas por quatro a seis meses, emitem novas folhas e florescem no início da estação chuvosa e seus frutos amadurecem no início da estação seca (LORENZI, 2009). Suas sementes apresentam alto percentual de germinação (70%), que tem início a partir do terceiro dia após a semeadura e produzem plântulas do tipo fanero-epígeo-armazenadoras (NOGUEIRA et al, 2010).…”

Section: A Espécie Estudadaunclassified

Fenologia de Dalbergia cearensis Ducke (Fabaceae) em um fragmento de floresta estacional, no semiárido do Nordeste, Brasil

et al. 2013

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RESUMO -Em geral, espécies arbóreas que ocorrem na vegetação de Caatinga, no semiárido do Nordeste brasileiro, têm suas fenofases (floração, frutificação e mudança foliar) condicionadas pela duração e intensidade da seca sazonal. Este estudo registrou a fenologia da queda foliar, incisão, floração e frutificação em 32 indivíduos de Dalbergia cearensis. Os indivíduos foram amostrados a cada 15 dias em 2009-10 e 2010-11, na Unidade de Conservação de Uso Sustentável "Fazenda Não me Deixes", situada em Quixadá, Ceará, Semiárido brasileiro. A frequência de ocorrência das fenofases foi relacionada com os elementos do clima (precipitação pluviométrica média mensal, temperatura média mensal, insolação média mensal e disponibilidade hídrica no solo). A fenologia vegetativa, queda e brotamento de novas folhas, acompanhou a sazonalidade da precipitação pluviométrica durante as estações seca e chuvosa. A floração e frutificação ocorreram no início das chuvas, e os diásporos de D. cearensis são dispersos o ano inteiro, após se desprenderem lentamente das panículas axilares compactas.Palavras-chave: Deciduidade; Sazonalidade; Fenofases. PHENOLOGY OF Dalbergia cearensis DUCKE (FABACEAE) IN A SHERED OF SEASONAL FOREST IN THE NORTHEAST SEMIARID, BRAZIL

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Caracterização da germinação e morfologia de frutos, sementes e plântulas de Dalbergia cearensis Ducke (pau-violeta) - Fabaceae

Cited by 23 publications

References 28 publications

Robustness of germination analysis methods for Copaifera langsdorffii Desf. (Fabaceae) seeds

Robustness of germination analysis methods for Copaifera langsdorffii Desf. (Fabaceae) seeds

Morphological analysis of fruits, seeds, and seedling germination Acacia farnesiana (L.) Willd

Fenologia de Dalbergia cearensis Ducke (Fabaceae) em um fragmento de floresta estacional, no semiárido do Nordeste, Brasil

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